Portal authentication is also called Web authentication. Users can authenticate user identities through the Web authentication page. Which of the following descriptions of Porta1 authentication is wrong?

Portal authentication is also called Web authentication. Users can authenticate user identities through the Web authentication page. Which of the following descriptions of Porta1 authentication is wrong?
A . Generally, Portal authentication does not require the installation of specialized client software, so it is mainly used in terminal access scenarios that do not require client software.
B . Porta1 authentication can authenticate users based on the combination of user name, VLAN, IP address, and MAC address.
C . When Porta1 authentication is deployed on the network, the authenticated client needs to support the Porta1 protocol.
D . Before performing Porta1 authentication, the client must obtain an IP address and the IP address must be reachable with the Porta1 server.

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Answer: C